Sidewall of a bottle



FIG. 1 is a front elevation view thereof;

FIG. 2 is a front perspective view thereof looking downwardly from above;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken line environmental showing is for illustrative purposes only and does not form a part of the claimed design, and the side and rear elevational views are the same as the front elevational view. 

The ornamental design for a sidewall of a bottle, as shown and described. 